could nRF24LE be in long sleep?

[peter]

Good Moring engineers. I just got nRF24LE . I am wondering the timer2 only provide 2 seconds long period ? I want my project nRF24LE sleep as long as possible , at less 6 hours or more. it's possible? Any information , thanks, I have been looking for this few day with no luck. the main code as follow:

CLKLFCTRL=0x01; RTC2CMP0=0xff; RTC2CMP1=0xff; RTC2CON=0x06;
WUIRQ=1;

[Håkon Alseth]

Hi,

The RTC on the nRF24LE1 only has 16 bit CC-registers, meaning that the max. timeout set is:

65536 / 32768 Hz = 2 seconds

You'll need to extend the sleep period by adding a counter in the tick interrupt. It will still wake up every 2 seconds, but it will only be awake for a brief period (lower micro-second range).

Cheers, Håkon

[peter]

Hi , thanks for your reply. Do you mean I add a static counter to deal the among of time I wanted? and of course during the tick interrupt only if do counter++ and put the power down by ( PWRDWN = 0x04; ) , these will not take much power consumption as I expected ? thanks

[Håkon Alseth]

Yes, you extend the sleep time by adding a counter++ and checking this in main before you enter sleep again. This should not add much extra current. Cheers, Håkon

[peter]

thank you so much hakon alseth. Your information is helpful.